Form for concrete culverts.



.B. TAYLOR. FORM FOR CONCRETE CULVERTS.

APPLICATION FILED MAR-6.1917.

Patented Aug. 28, 191?.

v.L'VITNESSES:

BLAKE TAYLOR, 0F PINEVILLE; WEST VIRGINIA.

FORM FOR CONCRETE CULVERTS.

Specification of Letters Patent.

Patented Aug. 2%, 19 1?.

Application filed March 6, 1917. Serial No. 152,569.

To all whom it may concern:

Be it known that I, BLAKE TAYLOR, a citizen of the United States of America, and resident of Pineville, county of Wyoming, and State of West Virginia, have invented certain new and useful Improvements in Forms for Concrete Culverts, of which the following is a specification.

This invention relates broadly to culvert forms, and more particularly to a form for concrete culverts and to the method of employing the same.

The primary object of the invention is to provide a simple and comparatively inexpensive culvert form which not only permits of the building of the culvert in sections or as conditions may render expedient, but which also permits of'the construction of the upper and lower halvesseparately, or at different times, having in view to facilitate the work and to reduce the labor and expense of construction to a minimum.

A further object is to provide a form for use in culvert construction, a part or all of which may become a permanent part of the completed structure, it being so inexpensively made that the salvage value of the parts not readily recoverable is insufficient to justify the time and labor necessary to effect their removal.

With these and other important objects in View, the invention resides in the features of construction, arrangement of parts, and combinations of elements and method of using which will hereinafter be fully described, reference beinghad to the accompany drawings, in which Figure 1 is a perspective view of the invention, showing successive stages in the construction of a culvert;

Fig. 2 is a cross section of the invention, showing the lower half of a culvert completed;

Fig. 8 is an enlarged detail view showmg a portion of the upper half of the form; and

Fig. 4 is an enlarged detail perspective view, partly in section, showing a spacmg block.

In constructing a culvert 1n accordance with my invention, two separate form sections are employed, one being a bottom section and the other a top section. The bottom section is used as a support for the lower half or section of the culvert proper, which is formed not only prior to the formation of the upper half or section of the culvert, but also prior to building up the top section" of the form. The bottom form-section is preferably of semi-cylindrical form and is'designed to serve as a support for the concrete of the lower culvert-section which is poured or otherwise suitably applied, as by a cement gun to the upper, or interior, face thereof; and the top form-section, which is also preferably of semi-cylindrical. form, is designed to serve as a support for the concrete of the upper culvert-section which is applied to the upper, or exterior, ra e thereof. The said top form-section is of such relatively smaller size-that is, is constructed upon a radius of such relatively less lengththan the bottom formsection that the upper culvert-section formed on the former has the same cross sectional dimen'sions as those of the lower culvert-section formed on the latter, thus providing for the union of the upper and lower culvertsections in a one-piece culvert body of regular shape or curvature throughout.

In the drawings, 1 indicates the bottom form-section which may be constructed of any suitable material, preferably wooden boards laid lengthwise edge to edge and having a substantially semi-cylindrical trough shape, the same being mounted upon and supported by the lower sections 2 of properly shaped form templets composed of appropriate material, which templets are disposed in alinement and are located at appropriately spaced intervals. Rigidly mounted upon the upper, or interior, face of said form section 1 is a plurality of suitably located lugs or supports 3 which have notches or recesses 4 formed in the lateral edges thereof designed for the reception in seated position of metal rods 4:, preferably arranged in interlaced relation, which are designed to be embedded in and to constitute a reinforcement for the concrete composing the lower culvert-section 5, said concrete being spread to a substantially even depth over the interior surface of said form section 1.

Each of the lower templet-sections 2 carries thereon at each of its opposite ends an upright arm or post 6 designed for having rigidly attached thereto the opposite ends of upper templet-sections 7 which are disposed in reversed relation to said templet-sections 2. In practice, said sections 7 are mounted in place subsequent to the formation, as hereinbefore described, of the bottom culvert-section. The curved surface of said section 7 is formed with a radius substantially equal to that of the inner surface of the form-section 1, so that the outer surface of the top culvert-section 8 which is gaged thereby will be accurately coextensive with the outer, or under, surface of the lower culvert-section 5 formed on the bottom form-section 1.

The top form-section 9 which is also composed of boards disposed lengthwise has its exterior, or upper, surface in the arc of a circle whose radius is substantially the same as that of the interior of the lower culvertsection 5. Said section 9 has mounted on its exterior surface at properly spaced in tervals a series of lugs 10 similar to the lugs 3, hereinbefore mentioned, which serve as supports for a suitable reinforcement composed of rods 11 or the like. Some of said lugs, as 10 serve as space-blocks whereby said top form-section 9 is held at a spaced distance from the upper templet-section 7, such lugs being disposed between the latter and said form-section 9, as shown in Figs. 1, 2 and 3.

Said form-section 9 has its component boardsloosely seated upon underlying shapemaintaining supports disposed at points adjacent to the positions occupied by the templets, each support being composed of a plurality of centering pieces, or frame members, 12 which, together with said form-section 9, are suspended from the upper tem plot-section, as by means of wires 18. Said frame members 12 are pivotally connected at their adjacent ends, as upon withdrawable pivot nails 14. 4

When the top form-section has been mounted, as aforesaid, concrete is spread thereon. preferably by means of a cement gun to form the upper culvert section 8. As is obvious, the space between the top formsection and the upper templet-section is of the proper thickness desired for the upper culvert-section and constitutes a guide or gage in the application of the concrete.

It will be evident that the top form section may be collapsed by cutting the supporting wires 13, after which it may be readily removed if desired, it being understood that when said wires are cut the frame members 12 relatively move inward on their pivot pins 14, permitting the boards of the upon the lower of said templet sections, and.

a top form-section suspended from said upper templet-section at a spaced distance from the latter, said top form-section having its 35 outer surface in the extended curvilinear surface of the interior of the concrete applied to said bottom form-section.

2. A form for concrete culverts and the like, comprising upper and lower templetsections adapted to be rigidly connected in superposed relation, a bottom form section of substantially semi-circular shape mounted upon the lower of said templet sections, and a top form-section suspended from said upper templetsection, said upper templet-section having itslower edge or face in the ex tended curvilinear surface of the interior of said bottom form-section, and said top formsection being spaced from said edge or face a distance approximating the desired thickness of concrete to be applied thereto.

3. A form for concrete culverts and the like, comprising a templet-section, a bottom form-section mounted upon said templetsection, a second templet-section adapted to be superposed upon the first-mentioned templet-section subsequent to the application of the concrete to saidbottom form-section, a top form-section complemental to said bottom form-section and spaced from the extended curvilinear surface of the interior of the latter a distance substantially equal to the thickness of the cement applied to the latter, said top form-section being suspended fromsaid upper templet-section, said upper templet-section having its lower edge or face curved'to correspond with the curvature of the interior surface of the bottom-form section and in the extended curvilinear surface of the interior of said bottom form-section, and means whereby said top form-section is suspended.

4. A form for concrete culverts and the like, comprising bottom and top form-sections, each of substantially semi-circular form, designed to have concrete applled respectively tOlil'lBlI' 1nter1or and exterior surllfl faces at separate and distinct steps in the In testimony whereof, I affix my signaconstruction of the culvert, said form-secture in presence of tWo subscribing Wit- 10 tions being of such relative sizes that the nesses.

concrete applied to the top form-section accurately registers and forms a union with BLAKE TAYLOR that applied to the bottom form-section, and Witnesses:

superposed templet-sections forming sup- R. E. HAWKINS,

ports for said form-sections. R. BRowER ZINN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

